CMMG DISSENT, Complete Upper Receiver, 5.7X28MM, 6.5" Threaded Barrel, 1/2x28, CMMG Zeroed Linear Compensator, Cerakote Finish, Armor Black, M-LOK Free Float Handguard, Fits AR-15/CMMG MK57 Lower Receiver, Includes 1913 Picatinny Rail End Plate 57BA8AE-AB